The phrase "wicked witch" refers to a very mean or bad female character, often portrayed in stories or movies as having magical powers and causing trouble for others. Full definition
A teacher who had the same class for a second year decided to get inventive by making a satire (in cahoots with her students) where she plays a Viola - Swamp - style wicked witch of a teacher. (edutopia.org)
Stay away from fairy tales or stories that have potentially frightening aspects like wicked witches or dragons. (childdevelopmentinfo.com)
Each of the artworks are caricatures of the Disney representations with wicked witches who actually look scary and no limit to blood and death imagery. (creativeboom.com)